??? (Boss)

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File:Boss ??? name.png
Boss versus screen image
 
 
TableDividingLine1.png
 
In-game appearance
TableDividingLine2.png
 
Stage chest.png
Stage the void.png
TableDividingLine3.png
 
Final Boss Chest
Disambig.png This article is about the boss at the end of The Chest. For the playable character, see Blue Baby. For the floor, see Blue Womb. For the pill effect, see Pills.
??? is the boss of The Chest which is accessed by defeating Isaac in the Cathedral while holding The Polaroid The Polaroid
The Polaroid Icon.pngIf the character has half a red heart or no red hearts after taking damage, it triggers the Book Of Shadows effect, creating a shield that nullifies all types of damage for 5 seconds. Also allows entrance into The Chest.
(dropped by Mom after beating the Cathedral 5 times). He is a posthumous version of Isaac.

Behavior[edit | edit source]

During all three of ???'s phases, he will always shoot multiple tears in the player's direction at fixed intervals. These tears can be double tears and have a small chance to be homing tears.

??? will not begin attacking the player until he takes damage.

Phase 1

  • Shoots rapid-fire lines of tears that curve as they move.
  • Shoots rapid-fire lines of tears in eight directions with varying intensity and speed.

Phase 2

Phase 3

  • Spawns flies more aggressively.
  •  ??? will teleport at a distance in front of the player, either in the last direction he was moving, or directly onto the player if he didn't move at all. ??? will not teleport if he is slowed (e.g. with a Stop Watch Stop Watch
    Stop Watch Icon.pngRemoved in Afterbirth Automatically inflicts slow to all enemies in every room.
    Added in Afterbirth Upon taking damage, inflicts slow to all enemies for the current room.
    ).
  • Shoots rapid-fire lines of tears that curve as they move.

Gallery[edit | edit source]

Unlockable Items[edit | edit source]

  • Golden God!
    Golden God! - Defeat ??? and The Lamb for the 1st time.

In addition, beating ??? with a particular character for the first time will place a Polaroid Completion Mark on that character's post-it note.

Trivia[edit | edit source]

  • The music that plays during this boss fight is titled Ascension.[1] The term "ascend" is typically used in religion as the act of one's soul rising to Heaven.
  •  ???, along with Isaac, are the only two bosses who do not "die" upon losing all their health. Instead, ??? teleports away and the battle ends.
  •  ??? is commonly referred to as the 'blue baby' by the Binding of Isaac community, as well as Steam Achievements.
  • An identical ??? fight, with identical behavior and music, is used as the first phase of Hush, using a different sprite. The Hush version also has half the HP.
  •  ??? is one of the only bosses who's one of Delirium's forms that doesn't have any melted features, along with both of the angels.

References[edit | edit source]


Bosses Boss Monstro.png
Chapter 1
Stage basement.png
Stage cellar.png
Stage burning basement.png
Blighted OvumDingleThe Duke of FliesFamineFistulaGeminiGurglingsThe HauntLarry Jr.MonstroPinStevenWidow
Added in Afterbirth DangleLittle HornRag ManTurdlings
Chapter 2
Stage caves.png
Stage catacombs.png
Stage flooded caves.png
Carrion QueenC.H.A.D.ChubDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe Wretched
Added in Afterbirth The ForsakenThe FrailThe Stain
Added in Afterbirth † Big HornRag Mega
Chapter 3
Stage depths.png
Stage necropolis.png
Stage dank depths.png
The AdversaryThe BloatThe CageThe GateGishLokiMask Of InfamyMonstro IIWarMom
Added in Afterbirth Brownie
Added in Afterbirth † Sisters Vis
Chapter 4
Stage womb.png
Stage utero.png
Stage scarred womb.png
BlastocystThe BloatConquestDaddy Long LegsDeathLokiiMama GurdyMr. FredScolexTeratomaTriachnidMom's HeartIt Lives
Added in Afterbirth † Sisters VisThe Matriarch
Added in Afterbirth Blue Womb
???
Added in Afterbirth Hush
Chapter 5
Stage sheol.png
Stage cathedral.png
SatanIsaac
Chapter 6
Stage dark room.png
Stage chest.png
???The LambMega Satan
Added in Afterbirth Greed Mode
Ultra Greed
Added in Afterbirth Ultra Greed
Added in Afterbirth † Ultra Greedier
Added in Afterbirth † The Void
Stage the void.png
Added in Afterbirth † Delirium
Chapters 1-4 The FallenThe Headless Horseman
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
MainPageAchievements.png Achievements MainPageAttributes.png Attributes MainPageBosses.png Bosses TarotCard.png Cards and Runes MainPageChallenges.png Challenges MainPageChapters.png Chapters
Isaac App.png Characters MainPageBabies.png Co-op MainPageItems Small.png Items Item Pools Item Pools MainPageMonsters.png Monsters MainPageObjects.png Objects
Red heart.png Pickups BlueBlue.png Pills MainPageRooms.png Rooms MainPageSeeds2.png Seeds Guppy App.png Transformations The Left Hand Icon.png Trinkets